Neighbour primes: Difference between revisions
→{{header|Ruby}}: Add Ruby
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<pre>
[3, 5, 7, 13, 19, 67, 149, 179, 229, 239, 241, 269, 277, 307, 313, 397, 401, 419, 439, 487]
</pre>
=={{header|Ruby}}==
<syntaxhighlight lang="ruby">require 'prime'
p Prime.each(500).each_cons(2).select{|p, q| (p*q+2).prime? }</syntaxhighlight>
{{out}}
<pre>
[[3, 5], [5, 7], [7, 11], [13, 17], [19, 23], [67, 71], [149, 151], [179, 181], [229, 233], [239, 241], [241, 251], [269, 271], [277, 281], [307, 311], [313, 317], [397, 401], [401, 409], [419, 421], [439, 443], [487, 491]]
</pre>
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